Chemistry Quiz: Electrolysis of Water

What is the purpose of the experiment described in the text?

• To split the water molecule into oxygen and hydrogen

• To generate electricity from solar power

• To create synthetic fuels like ethanol

• To study the properties of fossil fuels

Why are pencil leads used as electrodes in the experiment?

• Because they are colorful

• Because they are resistant to corrosion

• Because they are highly conductive

• Because they are cheap and easily available

What safety precautions are recommended for the experiment?

• Conduct the experiment alone

• Wear eye protection and gloves

• Have a pet with you for assistance

• Use the experiment outdoors

What is the purpose of the small bags or latex gloves attached to the bottles?

• To add color to the experiment

• To prevent the gases from escaping

• To collect excess water

• To measure the temperature of the gases

How are the two 2L bottles connected in the experiment?

• By using a magnet

• By shaking the bottles vigorously

• By pouring the contents from one bottle to another

• By using a straw and hot glue

What is the main goal of splitting the water molecule into oxygen and hydrogen?

• To increase the water's pH level

• To create a chemical reaction

• To study the properties of water

• To collect the two gases for fuel

Why is it important to not let the bags or gloves collect too much gas?

• To keep the experiment clean

• To avoid explosions as the gases are highly explosive

• To prevent the gases from escaping

• To measure the volume of the gases accurately

What is the role of the steel wire in the experiment?

• To conduct electricity

• To stir the solution

• To measure the temperature

• To hold the bottles together

How can we show whether the gases collected are oxygen or hydrogen?

• By tasting the gases

• By performing a flame test

• By using a pH indicator

• By observing the color of the gases

What is the source of energy used to run the electrolysis machine?

• Solar power

• Wind power

• Electricity from two 9V batteries

• Chemical energy from the water